3 years ago

Stress compensation in an extended series of lanthanide 2-sulfonatoterephthalates [Ln(TPSO3)(H2O)2]n (Ln = Ce − Lu, except Pm)

Stress compensation in an extended series of lanthanide 2-sulfonatoterephthalates [Ln(TPSO3)(H2O)2]n (Ln = Ce − Lu, except Pm)
Thirteen lanthanide sulfonatoterephthalates, [Ln(TPSO3)(H2O)2]n (TPSO3 = sulfonatoterephthalate, C8H3O7S3−), with Ln = Ce − Lu, except Pm, as well as [Y(TPSO3)(H2O)2]n were obtained via hydrothermal syntheses. All materials are isotypic and crystallize in the triclinic crystal system with space group P 1 ¯ . They assemble as two-dimensional (2D) layers that are further tied into three-dimensional (3D) networks via hydrogen bonding. The compounds possess LnO9 coordination polyhedra, which further assemble as Ln2O16 clusters via edge sharing of two oxygen atoms being supplied by two sulfonato-groups. TPSO3-spacers interlink the coordination polyhedra along the b-axis, while carboxylate groups connect adjacent Ln3+-ions in the c-direction. The resulting 2D-layers are tied together along the a-axis via hydrogen bonds between coordinated water molecules and two oxygen atoms of the sulfonato-substituents. When plotted versus the ionic radii, the cell parameters, especially the cell volume, show a linear decline between Ce and Tm. We further characterized these materials utilizing elemental analyses, powder X-ray diffraction, and FT-IR spectroscopy.

Publisher URL: www.sciencedirect.com/science

DOI: S0020169317312872

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